Fuel supply system



March 27, 1934. a F N L IQ 1,952,510

FUEL SUPPLY SYSTEM Original Filed Jan. 27, 19:50 ZSheets-Sheet l ATTOE/VEYJ Original Filed Jan. .27, 1950 2 Sheets-Sheet 2 4 TTOENEYJ' Patented Mar. 27, 1934 UNITED STATES PATENT OFFICE Superior Engine Company, Inc., Springfield, Ohio, a corporation of Delaware Original application January 27,1930, Serial No.

423,704. Divided and this application September 8, 1931, Serial No. 561,652

1 Claim.

My invention relates to a fuel supply system for internal combustion engines.

It is the object of my invention to provide a governor controlled fuel supply system in which the operation of the governor can be adjusted at any predetermined setting, within which range the fuel control system will operate.

It is a further object to provide a fuel by-pass system in order that excessive fuel may be bypassed back to the source of supply, and this adjustment for by-passing may be varied according to the conditions of operation of the apparatus, thereby attaining a fuel pressure as desired.

It is a further object to provide this control system to facilitate starting of the engine, the regulation of the speed of the engine after starting, the regulation of the fuel supply, all in combination with an injector, through which fuel is injected under a predetermined fuel pressure being admitted at intervals according to the mechanical adjustment of the adjusting mechanism of this invention by mechanical operation of the fuel injector.

This application is a division of my application, Serial No. 423,704, filed January 2'7, 1930.

Referring to the drawings:

Figure 1 is a diagrammatic view of the fuel system;

Figure 2 is a section on the line 22 of Figure 1 showing the details of the fuel by-pass control;

Figure 3 is an enlarged detail view partially in section showing the fuel by-pass arrange ments and the relationship of the control levers.

Referring to the foregoing views, lrepresents a pipe line from a tank that supplies the fuel through a pump indicated diagrammatically at 2 and suitably driven from any source of power, such as the engine itself, or otherwise. The fuel is ejected from the pump through the line 3 and thence passes through the pipe 4 to the fuel injector, not shown. Fuel is also delivered through the pipe 5 to the by-pass valve 6 which is adapted to be opened by the fuel pressure therein in order to pass fuel oil through the pipe '7 back to the tank from which the pipe 1 draws the fuel in the event that the fuel has exceeded a predetermined pressure, as hereinafter determined.

' Fuel by-pass system When the fuel passes through the pipe 5, it enters a cylinder forming the chamber 8 in which the valve member fits. On the valve member is a shoulder 9 against which the fuel acts and tends to lift the needle valve stem 10 which closes the port 11 that shuts off the passage of fuel between the pipe 5 and the pipe 7.

The lifting of the needle valve 10 is resisted by the spring 12 which is mounted on the cap 13 at one end and rests against the cap 14 at the other end.

The cap '14 is engaged by a stud 15 carried on the rocker arm 16 which, in turn, is mounted on the shaft 17. The movement in one direction, that is, upwardly, of the rocker arm 16 is limited by the set screw 18 which is locked in position by the nut 19. This set screw is carried by the cover 20 which forms a part of the housing for this mechanism.

The other end of the rocker arm 16 opposite to that carrying the stud 15 has a stud 21 which engages with the fuel relief valve eccentric 22, which is keyed to the shaft 23 by the key 24 and clamped thereon by the bolt 25.

The compression of the spring 12 is thus controlled and, therefore, the pressure at which the valve stem 10 is lifted is controlled. The pressure of the fuel is thereby regulated. The shaft 23, which carries the fuel relief valve eccentric 22, has connected thereto the governor control handle 26 which serves to rotate it and position it.

The governor and governor shaft 42 are driven in the usual manner by the bevel pinion 42a, bevel gear 421) and cam shaft 420.

It will be understood that I desire to comprehend within my invention such modifications as may be necessary to adapt it to varying conditions and uses.

Having thus fully described my invention, What I claim as new and desire to secure by Letters Patent, is:

In combination, a fuel supply pipe, a cylinder open at one end and having a port in the other end, a valve member fitting in the cylinder and projecting out at the open end, said valve mem- 5 ber being reduced at the other end to form a shoul- V der, a valve stem for closing the port, a by-pass from the supply line to the cylinder between the port and the shoulder, a spring acting on the valve member to close the port, a lever acting on the spring to regulate its compression, and a screw acting on the lever to limit the expansion of the spring.

GEORGE F. NOLTEIN. 

